Personalized Cute 6th Birthday Penguin Women's V-Neck T-Shirt. 6th Birthday Party Penguin Women's V-Neck T-Shirt - White gift idea for your child's celebration. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit